American Board of Opticianry (ABO) Test 2025 – 400 Free Practice Questions to Pass the Exam

Question: 1 / 400

Which type of prescription has opposite sign conventions?

Hypermetropic Rx

Myopic Rx

Antimetropic Rx

Prescriptions for hypermetropia and myopia have the same sign conventions, indicating whether the patient needs lenses to correct for farsightedness or nearsightedness. An antimetropic prescription, on the other hand, has opposite sign conventions and is used to correct for astigmatism, a condition where the eye has an irregular curvature causing blurred vision. An astigmatic prescription, while addressing a different issue, still follows the same sign conventions as hypermetropic and myopic prescriptions. Therefore, the correct answer is C Antimetropic Rx.

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Astigmatic Rx

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